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# Copyright (C) 2014-2017 MongoDB, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
module Mongo
module Event
# This handles a change in description.
#
# @since 2.0.6
class DescriptionChanged
include Monitoring::Publishable
# @return [ Mongo::Cluster ] cluster The cluster.
attr_reader :cluster
# @return [ Hash ] options The options.
attr_reader :options
# @return [ Monitoring ] monitoring The monitoring.
attr_reader :monitoring
# Initialize the new host added event handler.
#
# @example Create the new handler.
# ServerAdded.new(cluster)
#
# @param [ Mongo::Cluster ] cluster The cluster to publish from.
#
# @since 2.0.0
def initialize(cluster)
@cluster = cluster
@options = cluster.options
@monitoring = cluster.monitoring
end
# This event publishes an event to add the cluster and logs the
# configuration change.
#
# @example Handle the event.
# server_added.handle('127.0.0.1:27018')
#
# @param [ Server::Description ] updated The changed description.
#
# @since 2.0.0
def handle(previous, updated)
publish_sdam_event(
Monitoring::SERVER_DESCRIPTION_CHANGED,
Monitoring::Event::ServerDescriptionChanged.new(
updated.address,
cluster.topology,
previous,
updated
)
)
cluster.add_hosts(updated)
cluster.remove_hosts(updated)
end
end
end
end
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